///

## Create a middleware { #create-a-middleware }

To create a middleware you use the decorator `@app.middleware("http")` on top of a function.

The middleware function receives:

* The `request`.
* A function `call_next` that will receive the `request` as a parameter.

    private final RepositorySystem repoSystem;
    private final List<RepositorySessionDecorator> decorators;

    @Inject
    public DefaultProjectDependenciesResolver(
            RepositorySystem repoSystem, List<RepositorySessionDecorator> decorators) {
        this.repoSystem = repoSystem;
        this.decorators = decorators;
    }

    @Override

## Добавление `dependencies` (зависимостей) в *декоратор операции пути* { #add-dependencies-to-the-path-operation-decorator }

*Декоратор операции пути* получает необязательный аргумент `dependencies`.

Это должен быть `list` состоящий из `Depends()`:

{* ../../docs_src/dependencies/tutorial006_an_py39.py hl[19] *}

Зависимости из dependencies выполнятся так же, как и обычные зависимости. Но их значения (если они были) не будут переданы в *функцию операции пути*.

Pero también puedes declarar el `Response` que quieres usar (por ejemplo, cualquier subclase de `Response`), en el *path operation decorator* usando el parámetro `response_class`.

Los contenidos que devuelvas desde tu *path operation function* se colocarán dentro de esa `Response`.

But you can also declare the `Response` that you want to be used (e.g. any `Response` subclass), in the *path operation decorator* using the `response_class` parameter.

The contents that you return from your *path operation function* will be put inside of that `Response`.

 * service. Subclasses should override one or more methods to modify the behavior of the backing
 * executor service as desired per the <a
 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p><b>{@code default} method warning:</b> This class does <i>not</i> forward calls to {@code
 * default} methods. Instead, it inherits their default implementations. When those implementations

In those cases, you can use the *path operation decorator* parameter `response_model` instead of the return type.

You can use the `response_model` parameter in any of the *path operations*:

* `@app.get()`
* `@app.post()`
* `@app.put()`
* `@app.delete()`
* etc.

* `/` yoluna gelen istekler

/// info | `@decorator` Bilgisi

Python'da `@something` sözdizimi "<abbr title="Decorator">dekoratör</abbr>" olarak adlandırılır.

Dekoratörler, dekoratif bir şapka gibi (sanırım terim buradan geliyor) fonksiyonların üzerlerine yerleştirilirler.

Bir "dekoratör" hemen altında bulunan fonksiyonu alır ve o fonksiyon ile bazı işlemler gerçekleştirir.

 * override one or more methods to modify the behavior of the backing multimap as desired per the <a
 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p><b>{@code default} method warning:</b> This class does <i>not</i> forward calls to {@code
 * default} methods. Instead, it inherits their default implementations. When those implementations

/// tip | Consejo

Puedes sobreescribir una dependencia utilizada en cualquier lugar de tu aplicación **FastAPI**.

La dependencia original podría ser utilizada en una *path operation function*, un *path operation decorator* (cuando no usas el valor de retorno), una llamada a `.include_router()`, etc.

FastAPI todavía podrá sobrescribirla.

///